Berta maggiore/boreale vs Black-throated Wattle-eye

Cory's Shearwater and Black-throated Wattle-eye are easily distinguished by their habitat and appearance. Cory's Shearwater is a large seabird typically found over open oceans, while the Black-throated Wattle-eye is a small, colorful bird of forested areas.

Location is a key factor: Cory's Shearwater is seen at sea, while the Black-throated Wattle-eye is found in forests. Size is another reliable mark, with Cory's Shearwater being much larger.

Cory's Shearwater is significantly larger than the Black-throated Wattle-eye.

Cory's Shearwater has a predominantly grey and white plumage, whereas the Black-throated Wattle-eye features striking black and white patterns with a distinctive black throat.

Cory's Shearwater is found over open oceans, while the Black-throated Wattle-eye inhabits forested regions.